Departing 12.30pm from Hyde Park Corner going up Piccadilly past the Japanese Embassy to Piccadilly Circus, right down Regent Street South past the offices of Lockheed-Martin, who part-own the UK’s nuclear-weapons factory at Aldermaston; then to Old Palace Yard, opposite the House of Lords via Charles II Street, Haymarket, Cockspur Street, Whitehall and Parliament Square.